I paid $200 for mine with a serial number close to yours, A195xxx. But...
that was 40 years ago. $590 seems a bit high, but all firearms are selling at a premium price now due to the covid-19. Go ahead and get it if you want it. It might be a long while before prices come back down. And in a year or two from now, it will be long paid for and the price won't matter any more.